{
  "manageEntity": {
    "action": "Save",
    "entityId": "158945418",
    "entityType": "Track",
    "nonce": "0x0b5c64f539b74d1c5c24498c2fdfdf90b12ec8c05bf759de61d40ea64366e426",
    "signature": "0xf2504bb8190e573fca26e0aac6235f279e778c8b530235265cccfc4633991b07466d0833441777e3657581ba5453df176ff2e518ba117b922222263fc6eb16f31c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}